Vongola's Chibi clean freak

What happens when the humanity's strongest soldier reincarnates as the good for nothing sawada tsunayoshi? What kind of chaos will unfold the mafia world?
"they brought this upon themselves, it's none of our business, lets just get out if here before they catch us too!" a bunch of students said as they run while panting, as if they're running for their lives.. "I-i can't go on.. I-im at my limit.. " one of the girls said, stopping from her tracks and trying to catch her breath. "No! Don't stop, keep going!!" another female student shout, pulling the other one by her hand the latter shook her head and pushed her ahead "go on. I-ill buy you guys time to.. Escape.. " The other students grit their teeth and keep running, leaving her behind. "Let's not let her sacrifice be in vain!!" one of the boys yelled, and they all cry dramatically while running through the school hallways.
D O O M D O O M!
they all froze in their place. "h-how come that demon is in front of us??!!"
"i-i-impossible!!"
"I will beat you to death." The stranger said. They all get terrified and turn to run back but..
"You brats sure run fast." another male approaches them, with the female from before following behind him"i-im sorry.. I couldn't.. Stop him.. " she said, keeping her head down. The students stand still. They know they messed up. And there's no way out, they are surrounded.
"It's over.. "
"The.. The.. demon due are here!"
The students yell.
"remember to.. "
"follow school regulations."
The two males say in union.
The raven one took his tonfa from where God knows., as for the brunette, he put on his black gloves. the two of them are ready to attack until a student shouted desperately " ALL OF THIS JUST BECAUSE WE FORGOT A SPOT WHILE CLEANING OUR CLASSROOM!?!?"
And kusakabe who was watching all this sighed and shook his head.
" rest in peace " he mumbled.